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Fischer-Tropsch synthetic wastewater treatment device and treatment method for Fischer-Tropsch synthetic wastewater

A technology for Fischer-Tropsch synthesis wastewater and treatment device, which is applied in the field of coal liquefaction and can solve the problems of difficulty in Fischer-Tropsch synthesis of wastewater

Active Publication Date: 2020-10-20
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of Fischer-Tropsch synthetic wastewater treatment device and the treatment method of Fischer-Tropsch synthetic wastewater, to solve the very difficult problem of Fischer-Tropsch synthetic wastewater treatment in the prior art

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Embodiment 1

[0055] Under the condition that the influent CODcr is 30000-36000mg / L and the pH value is 3.0, the residence time of the microbial electrolytic cell and the anaerobic reactor are controlled to be 4h and 4d respectively, and the current density of the microbial electrolytic cell is maintained at 15mA / cm2. The reflux ratio of the secondary settling tank is 250%. After the Fischer-Tropsch synthetic wastewater treatment plant has been running stably for 60 days, the average removal rate of CODcr in the microbial electrolytic cell is 6%, but organic alcohol and organic acid (carbon chain > 2) to acetic acid The conversion rate is stable above 90%, the removal of CODcr by the anaerobic reactor is stable above 75%, and the CODcr in the anaerobic effluent is 5700mg / L~6480mg / L, which can be effectively degraded and removed through the anaerobic stage, greatly reducing the subsequent good The load of the aerobic biological sludge method saves the cost of subsequent aerobic aeration biode...

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Abstract

The invention provides a Fischer-Tropsch synthesis wastewater treatment device and a treatment method for Fischer-Tropsch synthesis wastewater. The Fischer-Tropsch synthesis wastewater treatment device comprises a microbial electrolytic tank, an anaerobic reactor and a secondary sedimentation tank which successively communicate, wherein the microbial electrolytic tank comprises a wastewater inlet, a return inlet and a first treatment liquid outlet; and the secondary sedimentation tank comprises a clean liquid outlet and a return outlet, and the return outlet communicates with the return inlet. By coupling the biological microelectrolysis with anaerobic biodegradation and recycling returned clean liquid with certain alkalinity in the secondary sedimentation tank, the pH value of the Fischer-Tropsch synthesis wastewater is relatively quickly increased; and the Gibbs free energy of converting alcohol into organic acid is reduced through an assisting action of a current in the microbial electrolytic tank, so that alcohol and most of organic acids (carbon chains are greater than 2) are converted into acetic acid as far as possible so as to provide convenience for methanation of a follow-up anaerobic reactor, and therefore, COD of the wastewater after anaerobic degradation can be reduced by more than 80%.

Description

technical field [0001] The invention relates to the technical field of coal liquefaction, in particular to a Fischer-Tropsch synthetic wastewater treatment device and a treatment method for the Fischer-Tropsch synthetic wastewater. Background technique [0002] Due to our country's resource characteristics of lack of oil (petroleum), lack of gas (natural gas), and rich coal, and the world's oil resources are gradually in short supply, the current indirect coal liquefaction technology has great prospects in China, and has gradually formed a mature industry. industrial chain. The technology of indirect coal liquefaction to oil has greatly eased the tension in the international oil industry. As the technology of indirect coal liquefaction to oil has matured, coal chemical companies have increased the output of synthetic oil from coal indirect liquefaction. At the same time, how to build It is the trend of the times to have a sewage treatment system that matches the waste water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F3/005C02F3/28C02F9/00C02F2001/007C02F2301/08
Inventor 王德欣魏江波张蔚赵代胜韩洪军徐浩方芳李琨王晓霞
Owner CHNA ENERGY INVESTMENT CORP LTD
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